【摘要】 对合成的两种二芳基乙烯类光致变色化合物1,2-双(2-甲基-5-(4-N,N-二甲氨基苯基)噻吩-3-基)全氟环戊烯(1a)和1,2-双(2-甲基-5-萘基噻吩-3-基)全氟环戊烯(2a)进行了紫外-可见吸收光谱分析.实验结果表明:在254 nm紫外光照射下,1a和2a的乙醚溶液均由无色变为蓝色,最大吸收峰分别为608和552 nm.在适当波长可见光照射下,均从有色态返回到无色态.此外,运用时间分辨UV-Vis光谱考察了这两种二芳基乙烯类化合物在溶液中的光致变色反应的动力学特征.1a和2a的闭环反应为零级反应,对应的开环反应属于一级.更多还原

【Abstract】 Two photochromic dithienylethenes compounds,1,2-bis[2-methyl-5(p-N,N-dimethyl-aminophenyl)-3-thienyl]perfluorocyclopentene(1a) and 1,2-bis(2-methyl-5-naphthalene-3-thienyl) perfluoro-cyclopentene(2a) were investigated by UV-Vis spectrum.Upon irradiation with 254 nm light,the colorless minxture of ether and compound 1a and 2a turned blue,in which the maximum absorption was observed at 608 and 552 nm.The colored solution returned to a colorless one on irradiation with visible light(λ>500 nm).Their photochromic cylization reaction and cycloreversion reaction were deterimined to be zeroth and first order reactions,respectively.更多还原